Process for the production of artificial-stone plates.



No. 813,171. PATENTED FEB. 20, 1906. C. POHL. PROCESS FOR THB PRODUGTION 0P ARTIFICIAL STONE PLATES.

APPLICATION FILED MAY2,1905.

Ii {24233 as jnwn' a-r' Om im (me ?%5 if "in? its twp": t A l /L will cAn PUHL, or IBUDAlEb' t a nirft; we r ir u ym Specification of Letters- Patent.

Patented Feb. 20, 1906.

Application filed May $1905. Serial No, 258,556.

5 pire ol' Austria-llungnry, have invented eertain new and useful improvements in Processls for the Production of Artilieiabtitone llales, ol' which the following is 22 sperilirnlion. v

in the German Patent No. 15. ,lblli there is set l'orl h a process for the nnmul'zu'ture of or lilirial-slone slabs ol' n filamentous material and hydraulic cement, in which process the filamentous nn terinl is applied in the l'orm of u Web-lil o l'abrie.

The present invention relates to on improvement on the al'oresoid process and is devised to simplil'y the apparatus for the'pro- (lll('li )ll ol' nrtilirial-stone slabs and at the same time to improve the product.

iii-cording to the process previously known smei'nl nnu-hines hard to be made use of in order to secure :t given strength of arlilii-ialeslone slabs, whereas :L( (5()l'tllll to the present ilnenlion onlyzi single machine is needed in order l o produce slabsol any desired strength A lurther impriwement ol the process previously known consists in that the lrvtlratulic I ('emenl is applied to the fabric in it dry state and the water is only, added nl'terwurd in the exact quantity required, whereby the excess ol' water in the previoiisly-employed process, which involves u very long treatment oi the slabs, is avoided.

in the :u-compunying drawing on unparatus l'or cnrryin g out the improved process is illustrated diugrmnmuticnlly.

'lhe lilumenlous material, preferably as bestos is placed in the requisite loose condition upon the carrier-band 1, from which it is delivered into tlieeurding-nnu-bine 12. in this 'nmehinc the lila-mentous nnrteriul is worked up in the well-known nutnner into at thin web like layer 3, and in this condition it arrives upon the cnrrier band 4. ,Abovcthe bond 4- is placed a hopper 5, through which the hydraulic binding material is supplied in it com pletelv dry and pmvderod conditidn onto tile web-like layer 25. The bindingmateriel consists, preferably, of send and cement which has been Well mingled in e iuixii'ig-inochine and is delivered by suitable carrier devices into the hopper 5. In the hopper 5 are arranged inclined plet'es 6, which effect the furvent any choking of the hopper. Under ther mixture of thawed and cement and pree aperture of the hopper ere placed distribingrolls .7 and s, which rolls distribute the powdered cementing); unite/rial uniformly over the entire width of the layer 3. The binding materiel thus equally scattered over th ut the layer itccumuhdles in the interstices there-' of. illose to the mouth of the hopper there is placed it nozzle 5), having line apertures and connected with at enter-pipe standing under high pressure. Thus :1 finely-divided stream of water is discharged upon the litycr covered with the binding material. The binding material absorbs theinoisture eagerly and at once begins to compact. Since the hydmulic binding material has been scattered in a dry state upon the dry layer of filaments and only so much water. is subsequently added as is just necessary to cause the bar dening oi the hydraulic binding nutteriel, the slabs burden very rapidly and are ready for use after being stored for from twcnty cight to thirty days, where-(ts in the process previously in use tothc hydraulic cement so much water was added that the excess of Witter bed to be removed during the manufacture of the slabs by ellowing it to run off and pressing it out, and the slabs lied to lie for months in order to burden.

in order-to utilize the short filaments and d ust which are thrown out of the carding-mechine, they are collected on the carrier-band l l, psssing under the rollers of the machine, and are delivered into a tube 12, from whence they are curried by suituble devices into a hopper 133. The hopper l3 possisses a bottom ol movable burs 14, which distribute the dust uponarevolving brush 15'. The revolvlug brush 15 is set in quick motion, thereby scattering the dust through a sieve 16 into the space 17, where it meets the line streams of \Vittfll' from the jet 9 and is thereby unii'ormly\ moistened and falls upon the layer of lilmnents 3, upon which the binding material has been previously scattered. r The layer of filamentous material and binding material thus produced is delivered by means of the (7lLIll6T-l)ltll(l 4 to s roller 18, from which 1t osses to an. endless bend 2 l, l ept 1n tension oy means of the edjustsble roller 19. The speed of the carrier-bend (i and of the roller 18 is from five to six times greater than that of the endless band 20,- So that the layer 3 luccs itself in folds upon th'band 205 The olds 21 are superimposed, antics the materiel at this" point isstillis'oft and pliable these sugierimposcd layers erejzcorqgg cted bymean's Ltd layer.

of the band 22 into one correspondingly-thick The greater the dilferencc between the speeds oithe Carrier-band i and of the band 20the thicker will be the layer of material formed on the band 20, so that it is possibleby means of a single machine to produce artifioial'stone plates of any desired thickness. In order to thoroughly compact the material between the two bands 20 and 22, there are provided under band 20 the strikers 23, ivhichcan be brought into oscillation by means of suitable means, so as to impart a quick series of little blows to the band 20, whereby the material upon said band is compaoted; The layer of material passes from the band 22 through a row of adjustable ressing-rollers 24, which lightly press the ayers so that the material leaving the last pair oi rollers 25 already possesses some firm ness. After the pair of rollers 25 there is revolubly supported a cutting-roller 26, which has projecting knives 27, revolving across the material-band. Under the cutting-roller '26 1s .a spring-supported table 28, upon. which the material is carried forward from the endless band 20. B corresponding revolutions this manner the material is divided into pieces of the desired size and then reaches a swingfing table 39, which swings about its axle 31 in v 4 4 the table 30 are delivered to a carrier-band such a manner that the pieces pushed upon 32. The swinging of the table 30 is effected w1th correspondingly great speed, so that the pieces cannot fall down from the table. After .45

the pieces have been laced by the table upon the carrier-band 32 tr e table 30 again swings backinto the position illustrated in the drawings in order to receive a number of fresh pieces. In. order that. the table 30 may have time enough to eilect its to-and-fro motion, the actuation-of the circular shears 29 is so arranged that these shears throw the pieces al ter they have seized them at a speed much greater onto the table 30 than, that at which the following pieces are pushed by the knives 27 between the shears, so that the'pieces can I arrive only atintervals upon the table 3i),and

the table 30 can complete an oscillation in these intervals of time. In order that the pieces may not travel too far upon the tab-le- 30, there is provided a stop 33 on the table.

The carrier-band 32 forwards the pieces lor further treatment pressing, drying,i&c, which is efl'ected in the well-known manner.

" Having now' particularly describedand ts folds produced thereby beingcompacted by cafri ier and an endless ii'IliLSSlS made of uniform'thickness.

pertained the nature of my said invent1on and in what manner the same is to be per formed, I declare that what I claim is 1. Process of producing artificial stone lates, consisting in spreading upon a layer of 7 lamentous material binding material, as hydraulic cement in a dry state and subsequent y adding waterin a finel-y-dividedconditlon and in the required uantity to compact the said binding material.

2. A process of producing artificial-stone plates, consisting in uniformly distributing upon a layer of dry filamentous material a binding material, as hydraulic cement mixed with sand, in a dry powdered'state, and subsequently adding water in a finely-divided condition and in the required duantity to compact the said binding materia 3. Process of producing artificial stone plates, consisting in uniformly distributing over a layer of dry filamentous material a binding material in a dry-powdered state,- subsequently adding water in a finely-divided condition and in the required quantity to compact the said binding material and carrying the not yet hardened mass at a certain speed onto a carrier moving at a less speed, the folds caused thereby in the mass being joined and compacted by pressing and shaking the mass. I

A A process of producing artificial stone plates, which consists inspreading hydraulic cement, mixed with sand, in a dry powdered condition upon a layer of dry filamentous material ,asv asbestos, subsequently adding water in small quantities so as to compact the binding material and carrying the not yetjhardened wet mass at a certain speed onto a carrier moving'at a less speed, the

shaking the carrier and assed between the and, whereby the 5. A process of producing artificial-stone plates, consisting in uniforml distributing a binding material, as hydrau ic cement in a dry powdered condition over a layer of dry filamentous -material, subsequently addin small quantities of water to com act the sai binding material and carrying tile whole not yet hardened mass at a certain speed .onto a carrier, 'movingat a less speed, folds in the mass being caused thereby, which folds are.

compacted by'oscillating heaters shalging said carrier and anendless band pressing the lib mass between itself and said carrier;

6. A process of producingartificial-stone' 1 plates, consisting in spreading a binding ma. terial, as hydraulic cement, in a finely-divided dry condition upon a loose 1a or oi dry filamentous material, subsequent y adding water in a finely-divid-ed condition to com pact the said binding material and carrying the not yet dried mass at a certain speed to a carrier, moving at a less speed, folds being pro- 1 o dueed thereby in the mass, which, by sheie ing the carrier and hy'epplyingpressure, are caused to form into a compact isyeref uniform thickness, means being provided for varying the speed of the carrier, whereby the thigkness of the compacted layer can be va ne v 7. A process of producing artificiabstone plates, of any desired thickness and size, consisting in spreading a binding material in a finely-divided dry condition upon a layer of dry filamentous materiel, subsequently edding a sufficient quantity of ater to compact the said binding materiel and carrying the i not yet hardened dried. at e eerteinj speed. to e earner, moving at e spee foide be ng caused therebyin the mess WEE! tolds are compacted by shaking the. ea. rier'end by pressure, thus ref nings 'eoinpset 1e er of unifarmthieimess the mess 2 5 e r compacted-being cut and divided into pirates of the required size, hile not yet hardened. 1 In testimony whereof K efiix my signature in presence-0f two Witnesses,

CARL PUHL,

Witnesses: Y

CHLUEN Fears, LOUIS VANDORY. 

